window.onload= function(){
	var small = document.getElementById('small');
	var big = document.getElementById('big');
	var drag = document.getElementById('drag');
	small.omouseover = function(){
		drag.style.display = 'block';
		big.style.display = 'block';
	}
	small.onmouseout = function(){
		drag.style.display = 'none';
		big.style.display = 'none';
	}
}